document.write( "Question 680409: the average of 4 numbers is 50. three of the numbers are 40 57 and 51 what is the fourth number \n" ); document.write( "

Algebra.Com's Answer #422324 by ReadingBoosters(3246) $\"\"$ $\"About$

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$\"%2840%2B57%2B51%2Bx%29%2F4+=+50\"$
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\n" ); document.write( " $\"%28148%2Bx%29%2F4+=+50\"$
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\n" ); document.write( "148 + x = 4(50)
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\n" ); document.write( "x = 200 - 148
\n" ); document.write( " $\"highlight_green%28x+=+52%29\"$ is the fourth number
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